Re: [CAD_CAM_EDM_DRO] screening

alex0young wrote:

> Hi,
>
> Got myself a screened cable with 2 wires to be used for the step-
> direction signal cables. I noticed that the USB cable screen is
> an "aluminised?" sheet in contact with an exposed earth wire.
>
> The "screened" cable I have, the "screen" is a "network" of fine
> copper strands, no "aluminised" sheet. Will this be as effective as a
> screen for signal cable?

The aluminized mylar shield, if made well, is slightly better at shielding
electrostatic fields. This makes a difference especially to microphone
signals running around inside radio stations, where the transmitter fills
everything with interference. The braided wire shield is more durable
over the long term with much cable flexing. Probably either will work
well in this case for a hobby or home shop machine. For real industrial
use, the braid shield would be desirable. There is also special cable
made with more, finer wire strands to be used in applications with a great
deal of flexing.

Jon